CN115930367A - Anti-freezing control method and device for air conditioner indoor unit and air conditioner - Google Patents
Anti-freezing control method and device for air conditioner indoor unit and air conditioner Download PDFInfo
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- 238000007710 freezing Methods 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005057 refrigeration Methods 0.000 claims abstract description 15
- 230000008014 freezing Effects 0.000 claims abstract description 14
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- 230000008569 process Effects 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 5
- 208000001034 Frostbite Diseases 0.000 claims 1
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention provides an anti-freezing control method and device for an air conditioner indoor unit and an air conditioner; wherein, the method comprises the following steps: when the air conditioner operates in a refrigeration mode, acquiring the temperature of an evaporator coil and the surface temperature of a wind guide door; calculating the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door; acquiring the air outlet temperature of the air conditioner, and judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition; if yes, controlling the air conditioner to operate according to the anti-freezing mode. In the control mode, whether the air conditioner has the evaporator freezing risk or not is comprehensively judged according to the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door and the air outlet temperature, the air conditioner is controlled to operate according to the anti-freezing mode, the operation capacity of the air conditioner is guaranteed, and the comfort experience degree of a user is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling anti-freezing of an air conditioner indoor unit and an air conditioner.
Background
The temperature of an evaporator of the air conditioner is usually lower under the refrigeration working condition, and when the heat exchange of the evaporator is poor due to the deposition of dust on a filter screen of an indoor unit, the temperature of a copper pipe is continuously reduced until the temperature is lower than 0 ℃; at this time, the surface of the evaporator begins to frost, and when the frost layer is accumulated to a certain thickness, the situation that the frost is blown to the indoor space may occur, which not only affects the capacity of the air conditioner, but also causes poor user experience. Therefore, how to prevent the air conditioner from frosting and to defrost in time is an urgent problem to be solved.
Disclosure of Invention
In view of the above, the present invention provides an anti-freezing control method and device for an air conditioner indoor unit, and an air conditioner, so as to alleviate the above technical problems, and comprehensively determine whether the air conditioner has an evaporator freezing risk by using a temperature difference between an evaporator coil temperature and a surface temperature of a wind guide door and combining an outlet air temperature, and control the air conditioner to operate according to an anti-freezing mode, thereby ensuring an operation capability of the air conditioner, and improving a comfort experience of a user.
In a first aspect, an embodiment of the present invention provides a method for controlling anti-freezing of an air conditioner indoor unit, where the method includes: when the air conditioner operates according to a refrigeration mode, acquiring the temperature of an evaporator coil and the surface temperature of a wind guide door; calculating the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door; acquiring the air outlet temperature of the air conditioner, and judging whether the air outlet temperature and the temperature difference meet anti-freezing conditions or not; the anti-freezing condition comprises a first anti-freezing condition and a second anti-freezing condition, wherein the first anti-freezing condition is used for representing the anti-freezing condition when the air conditioner starts to frost, and the second anti-freezing condition is used for representing the anti-freezing condition in the frosting process of the air conditioner; if so, controlling the air conditioner to operate according to the anti-freezing mode.
According to the anti-freezing control method for the air conditioner internal unit, whether the air conditioner has the evaporator freezing risk or not is comprehensively judged through the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door and the combination of the outlet air temperature, the air conditioner is controlled to operate according to the anti-freezing mode, the operation capacity of the air conditioner is guaranteed, and the comfort experience degree of a user is improved.
Preferably, the anti-freezing condition comprises a temperature difference threshold value and a temperature threshold value; the temperature difference threshold comprises a first temperature difference threshold and a second temperature difference threshold, and the first temperature difference threshold is smaller than the second temperature difference threshold; the temperature threshold comprises a first temperature threshold and a second temperature threshold, and the first temperature threshold is greater than the second temperature threshold; judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition or not, wherein the steps comprise: judging whether the temperature difference is not less than a first temperature difference threshold value and is less than a second temperature difference threshold value; and whether the outlet air temperature is less than a first temperature threshold value; and if so, judging that the outlet air temperature and the temperature difference meet the first anti-freezing condition.
Preferably, the step of determining whether the outlet air temperature and the temperature difference satisfy the anti-freezing condition further includes: judging whether the temperature difference is smaller than a first temperature difference threshold value or not, and judging whether the air outlet temperature is smaller than a second temperature threshold value or not; and if so, judging that the outlet air temperature and the temperature difference meet a second anti-freezing condition.
Preferably, the step of controlling the air conditioner to operate according to the anti-freezing mode if the outlet air temperature and the temperature difference satisfy the first anti-freezing condition includes: controlling the rotating speed of an indoor fan of the air conditioner to be increased to the maximum rotating speed.
Preferably, the step of controlling the air conditioner to operate according to the freeze prevention mode if the outlet air temperature and the temperature difference satisfy the second freeze prevention condition includes: and controlling the frequency of a compressor of the air conditioner to be reduced according to a preset variable quantity, and controlling the compressor to operate according to the reduced frequency.
Preferably, the step of obtaining the temperature of the evaporator coil and the temperature of the surface of the air guiding door comprises: controlling a radar to transmit millimeter waves to the air guide door and acquiring a signal strength value of the millimeter waves reflected by the air guide door; determining the corresponding surface temperature of the air guide door according to the signal intensity value and a preset relation; the preset relation is used for representing the corresponding relation between the millimeter wave signal intensity and the temperature.
Preferably, the step of obtaining the temperature of the evaporator coil and the temperature of the surface of the air guiding door further comprises: acquiring the temperature of an inlet pipe and the temperature of an outlet pipe of an evaporator in an air conditioner; and carrying out average calculation according to the temperature of the inlet pipe and the temperature of the outlet pipe to obtain the temperature of the evaporator coil.
In a second aspect, an embodiment of the present invention further provides a device for controlling anti-freezing of an indoor unit of an air conditioner, where the device includes: the acquisition module is used for acquiring the temperature of an evaporator coil and the surface temperature of the air guide door when the air conditioner operates in a refrigeration mode; the computing module is used for computing the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door; the judging module is used for acquiring the air outlet temperature of the air conditioner and judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition; the anti-freezing condition comprises a first anti-freezing condition and a second anti-freezing condition, wherein the first anti-freezing condition is used for representing the anti-freezing condition when the air conditioner starts to frost, and the second anti-freezing condition is used for representing the anti-freezing condition in the frosting process of the air conditioner; and the control module is used for controlling the air conditioner to operate according to the anti-freezing mode if the current air conditioner is operated according to the anti-freezing mode.
In a third aspect, an embodiment of the present invention further provides an air conditioner, including a memory, a processor, and a computer program that is stored in the memory and is executable on the processor, where the processor implements the steps of the method in the first aspect when executing the computer program.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method in the first aspect.
The embodiment of the invention brings the following beneficial effects:
the embodiment of the invention provides an anti-freezing control method and device for an air conditioner indoor unit and an air conditioner.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for controlling anti-freezing of an air conditioner indoor unit according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for controlling anti-freezing of an air conditioner indoor unit according to an embodiment of the present invention;
fig. 3 is a schematic view of an anti-freezing control device for an air conditioner indoor unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the understanding of the present embodiment, the following detailed description will be given of the embodiments of the present invention.
The embodiment of the invention provides an anti-freezing control method for an air conditioner indoor unit, wherein an execution main body is a controller of the air conditioner, and as shown in figure 1, the method comprises the following steps:
step S102, when the air conditioner operates according to a refrigeration mode, acquiring the temperature of an evaporator coil and the surface temperature of an air guide door;
specifically, the air conditioner operates in a refrigeration mode, and the controller acquires temperature information acquired by the acquisition device, wherein the temperature information includes but is not limited to the temperature Tw of an evaporator coil and the surface temperature Td of an air guide door; it should be noted that, here, the temperature information may be obtained in real time, or may be obtained according to a preset interval, for example, the collecting device collects the temperature information every 5 seconds, and sends the temperature information to the controller.
Wherein, for the evaporator coil temperature Tw, the acquisition process is as follows: acquiring the temperature of an inlet pipe and the temperature of an outlet pipe of an evaporator in an air conditioner; and carrying out average calculation according to the inlet pipe temperature and the outlet pipe temperature to obtain the temperature of the evaporator coil. Specifically, temperature sensors or temperature sensing bulbs are respectively arranged at an inlet pipe and an outlet pipe of the evaporator to detect the inlet pipe temperature Tin and the outlet pipe temperature Tout, and the controller obtains the inlet pipe temperature Tin and the outlet pipe temperature Tout and then carries out average calculation to obtain the evaporator coil temperature Tw, namely Tw = (Tin + Tout)/2.
For the damper surface temperature Td, the procedure is obtained as follows: controlling a radar to emit millimeter waves to the air guide door and acquiring a signal strength value of the millimeter waves reflected by the air guide door; determining the corresponding surface temperature of the air guide door according to the signal intensity value and a preset relation; the preset relation is used for representing the corresponding relation between the millimeter wave signal intensity and the temperature. Specifically, above-mentioned collection system still includes radar detection device, here the radar can set up the shell internal surface at indoor set, and keep a certain distance with the air guide door, and, radar and controller communication connection, be used for under the trigger control of controller, every 5s to the air guide door transmission millimeter wave, the millimeter wave can take place the transmission after touching the air guide door, when the temperature of aviation baffle reduces, the millimeter wave signal intensity value of reflection back will reduce, consequently, can save the corresponding relation of millimeter wave signal intensity and temperature in advance in the controller and predetermine the relation promptly, thereby the controller is according to the signal intensity value and the predetermined relation of the millimeter wave of reflection back, can confirm corresponding air guide door surface temperature Td.
Step S104, calculating the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door;
specifically, under the refrigeration condition of the air conditioner, no matter condensation or frosting occurs, water in the wet air at the air suction opening can be separated to the surface of the evaporator in a way of condensation water or frost layer, so that the air humidity at the air outlet of the air conditioner is generally higher and is between 85% and 90% conventionally, and the humidity can be regarded as a fixed value in the embodiment of the invention. However, when the air conditioner is frosted, the fins of the evaporator are blocked by ice, so that the air volume is reduced, and the temperature of the copper pipe is also reduced; namely, when the air conditioner operates normally, the air volume is large, and the temperature of the copper pipe is high (the cooling capacity is small); when the air conditioner frosts, the air quantity is small, and the temperature of the copper pipe is low (the cooling capacity is large); therefore, the difference value between the air outlet temperature and the evaporator coil temperature when the air conditioner is frosted is smaller than the difference value when the air conditioner is in normal operation, and because the air conditioner may blow frost into a room when frosted, the air outlet temperature has an error, therefore, the embodiment of the invention calculates the temperature difference delta T between the obtained evaporator coil temperature Tw and the air guide door surface temperature Td, namely delta T = Td-Tw.
Step S106, acquiring the air outlet temperature of the air conditioner, and judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition;
because the air-out temperature when the air conditioner frosts is less than the air-out temperature when the air conditioner normally operates, consequently, when judging whether there is the evaporimeter to freeze the risk under the air conditioner refrigeration operating mode, the controller still obtains the air-out temperature Tf of air conditioner, and here air-out temperature Tf can be obtained through the temperature sensor or the temperature sensing package that set up in air outlet department, specifically can set up according to actual conditions.
The anti-freezing condition comprises a temperature difference threshold value and a temperature threshold value; the temperature difference threshold comprises a first temperature difference threshold delta T1 and a second temperature difference threshold delta T2, and the first temperature difference threshold is smaller than the second temperature difference threshold, namely delta T1 is smaller than delta T2; the temperature threshold includes a first temperature threshold T1 and a second temperature threshold T2, and the first temperature threshold is greater than the second temperature threshold, i.e., T1 > T2. It should be noted that, in the experimental test, since the outlet air temperature is generally set to 12 ℃ to 14 ℃, here, 12 ℃ is selected, the inlet pipe temperature of the evaporator is generally 11 ℃ to 13 ℃, and the outlet pipe temperature is generally 9 ℃, the first temperature difference threshold Δ T1 is preferably 1 ℃, and the second temperature difference threshold Δ T2 is preferably 2 ℃; the first temperature threshold T1 is preferably 7 ℃ and the second temperature threshold T2 is preferably 2 ℃.
In practical applications, because the frost may occur at the early stage of frosting or at a certain degree of frosting, the above-mentioned frost-proof condition can be divided into a first frost-proof condition and a second frost-proof condition; the first anti-freezing condition is used for representing an anti-freezing condition when the air conditioner starts to frost, namely judging whether the outlet air temperature and the temperature difference meet the anti-freezing condition when the air conditioner starts to frost; the second anti-freezing condition is used for representing the anti-freezing condition in the frosting process of the air conditioner, namely whether the outlet air temperature and the temperature difference meet the anti-freezing condition or not is judged when the air conditioner is frosted to a certain degree.
Specifically, whether the temperature difference is not less than a first temperature difference threshold value and is less than a second temperature difference threshold value is judged; and whether the outlet air temperature is less than a first temperature threshold value; if so, judging that the outlet air temperature and the temperature difference meet a first anti-freezing condition; namely, when the delta T1 is more than or equal to the delta T and less than the delta T2 and the Tf is less than the T1, the air conditioner is judged to frost, and the air conditioner needs to be regulated and controlled so as to remove fine water drops/frost particles in time in a time period which is not easy to perceive, thereby ensuring the comfort level of a user. In addition, whether the temperature difference is smaller than a first temperature difference threshold value or not and whether the outlet air temperature is smaller than a second temperature threshold value or not are judged; and if so, judging that the outlet air temperature and the temperature difference meet a second anti-freezing condition. Namely when delta T is less than delta T1 and Tf is less than T2, the frost layer of the air conditioner is judged to be thick, and the air conditioner needs to be regulated and controlled to slow down the frosting speed.
Therefore, whether the evaporator freezing risk exists in the air conditioner under the refrigeration working condition is determined by judging whether the outlet air temperature and the temperature difference meet the anti-freezing condition or not; and the frosting condition of the air conditioner when the freezing risk occurs is determined through the air outlet temperature, the temperature difference and the corresponding threshold value, for example, the frosting condition is at the early stage of frosting or when the frost layer is thick, so that the judgment precision of the freezing risk of the evaporator is improved, and the operation capacity of the air conditioner and the comfort level of a user are further ensured.
And S108, if so, controlling the air conditioner to operate according to the anti-freezing mode.
Specifically, when the outlet air temperature and the temperature difference meet a first anti-freezing condition, the controller controls the rotating speed of the indoor fan of the air conditioner to be increased to the maximum rotating speed due to the fact that the air conditioner begins to frost at the moment, so that fine water drops/frost particles are removed in time in a time period which is not easy to sense, and the freezing risk of the evaporator is relieved. When the outlet air temperature and the temperature difference meet the second anti-freezing condition, the frost layer is thicker at the moment, the controller controls the frequency of a compressor of the air conditioner to be reduced according to the preset variable quantity, and controls the compressor to operate according to the reduced frequency, so that the cold quantity in the evaporator is reduced by reducing the circulation quantity of the refrigerant, and the frosting speed is slowed down; in addition, a fault signal of the filter screen blockage can be displayed on the display screen of the internal machine until the freezing protection is triggered, so that the operation capacity of the air conditioner is ensured.
To sum up, according to the anti-freezing control method for the air conditioner internal unit provided by the embodiment of the present invention, whether the air conditioner is frosted and the frosting degree are comprehensively determined by the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guiding door and combining the outlet air temperature, that is, whether the air conditioner has the evaporator freezing risk is determined, and the air conditioner is controlled to operate according to the anti-freezing mode, so that the operation capability of the air conditioner is ensured, and the comfort experience of the user is improved.
This is illustrated here for ease of understanding. As shown in fig. 2, the method for controlling anti-freezing of an air conditioner indoor unit according to an embodiment of the present invention further includes the following steps:
step S202, when the air conditioner operates according to a refrigeration mode, detecting the temperature Tin of the inlet pipe and the temperature Tout of the outlet pipe;
step S204, tw = (Tin + Tout)/2; namely, the evaporator coil temperature Tw is determined according to the formula;
step S206, controlling the radar to work to detect the surface temperature Td of the air guide door;
step S208, Δ T = Td-Tw; namely calculating the temperature difference delta T between the temperature Tw of the evaporator coil and the surface temperature Td of the air guide door;
step S210, judging that delta T is less than 1 ℃; if yes, go to step S218; if not, executing step S212;
step S212, judging that delta T is less than 2 ℃; if yes, go to step S214; if not, executing step S222;
step S214, judging Tf to be less than 7 ℃; if so, go to step S216; if not, executing step S222;
step S216, the controller controls the rotating speed of an indoor fan of the air conditioner to be increased to the maximum rotating speed; when delta T is more than or equal to 1 ℃ and less than 2 ℃ and Tf is less than 7 ℃, judging that the air conditioner is frosted, and regulating and controlling the air conditioner to remove fine water drops/frost particles in time in a time period which is not easy to sense, thereby ensuring the comfort level of a user;
step S218, judging that Tf is less than 2 ℃; if yes, go to step S220; if not, go to step S214;
step S220, the controller controls the frequency of a compressor of the air conditioner to be reduced according to a preset variable quantity; if the frequency of the compressor is controlled to be reduced by 30%, the compressor is controlled to operate according to the reduced frequency; when the delta T is less than 1 ℃ and the Tf is less than 2 ℃, judging that the frost layer of the air conditioner is thick, and regulating and controlling the air conditioner to slow down the frosting speed; it should be noted that if Δ T is less than 1 ℃ and Tf is greater than or equal to 2 ℃, then Tf is determined to be less than 7 ℃, if yes, step S216 is executed; if not, go to step S222;
and step S222, continuing to operate according to the refrigeration mode.
It should be noted that, if the temperature difference Δ T and the outlet air temperature satisfy the first anti-freezing condition or the second anti-freezing condition, the air conditioner is controlled to enter the anti-freezing mode to operate until the temperature difference Δ T and the outlet air temperature do not satisfy the first anti-freezing condition and the second anti-freezing condition, and the air conditioner exits the anti-freezing mode to continue to operate according to the operation state (such as frequency and rotation speed) of the refrigeration mode, that is, before step S216 or step S220 enters step S222, the air conditioner also exits the anti-freezing mode to operate; and if the temperature difference delta T and the air outlet temperature do not meet the first anti-freezing condition or the second anti-freezing condition, controlling the air conditioner to continue to operate according to the refrigeration mode. The above steps may refer to the above embodiments, and the embodiments of the present invention are not described in detail herein.
To sum up, the anti-freezing control method for the air conditioner internal unit provided by the embodiment of the invention comprehensively judges whether the air conditioner is frosted and the frosting degree by the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door and combining the air outlet temperature, namely judges whether the air conditioner has the evaporator freezing risk, and slows down the frosting speed by frequency reduction, wind speed adjustment and the like in an anti-freezing mode, so that the air conditioner freezing risk is relieved, the running capability of the air conditioner is ensured, and the comfort experience of users is improved.
Corresponding to the foregoing method embodiment, an embodiment of the present invention further provides an anti-freezing control device for an air conditioner indoor unit, as shown in fig. 3, the device includes: the device comprises an acquisition module 31, a calculation module 32, a judgment module 33 and a control module 34; the functions of each module are as follows:
the acquiring module 31 is used for acquiring the temperature of an evaporator coil and the surface temperature of a wind guide door when the air conditioner operates in a refrigerating mode;
a calculation module 32 for calculating the temperature difference between the evaporator coil temperature and the air guide door surface temperature;
the judging module 33 is used for acquiring the air outlet temperature of the air conditioner and judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition; the anti-freezing condition comprises a first anti-freezing condition and a second anti-freezing condition, wherein the first anti-freezing condition is used for representing the anti-freezing condition when the air conditioner starts to frost, and the second anti-freezing condition is used for representing the anti-freezing condition in the frosting process of the air conditioner;
and the control module 34 is used for controlling the air conditioner to operate according to the anti-freezing mode if the current mode is positive.
According to the anti-freezing control device for the air conditioner indoor unit, whether the air conditioner frosts or not and the frosting degree are comprehensively judged through the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door and the air outlet temperature, namely whether the air conditioner has the evaporator freezing risk or not is judged, the air conditioner is controlled to operate according to an anti-freezing mode, the operation capacity of the air conditioner is guaranteed, and the comfort experience degree of a user is improved.
Preferably, the anti-freezing condition comprises a temperature difference threshold value and a temperature threshold value; the temperature difference threshold comprises a first temperature difference threshold and a second temperature difference threshold, and the first temperature difference threshold is smaller than the second temperature difference threshold; the temperature threshold comprises a first temperature threshold and a second temperature threshold, and the first temperature threshold is greater than the second temperature threshold; the determining module 33 is further configured to: judging whether the temperature difference is not less than a first temperature difference threshold value and is less than a second temperature difference threshold value; and whether the outlet air temperature is less than a first temperature threshold value; and if so, judging that the outlet air temperature and the temperature difference meet the first anti-freezing condition.
Preferably, the judging module 33 is further configured to: judging whether the temperature difference is smaller than a first temperature difference threshold value or not, and judging whether the air outlet temperature is smaller than a second temperature threshold value or not; and if so, judging that the outlet air temperature and the temperature difference meet a second anti-freezing condition.
Preferably, if the outlet air temperature and the temperature difference satisfy the first anti-freezing condition, the control module 34 is further configured to: controlling the rotating speed of an indoor fan of the air conditioner to be increased to the maximum rotating speed.
Preferably, if the outlet air temperature and the temperature difference satisfy the second anti-freezing condition, the control module 34 is further configured to: and controlling the frequency of a compressor of the air conditioner to be reduced according to a preset variable quantity, and controlling the compressor to operate according to the reduced frequency.
Preferably, the obtaining module 31 is further configured to: controlling a radar to transmit millimeter waves to the air guide door and acquiring a signal strength value of the millimeter waves reflected by the air guide door; determining the corresponding surface temperature of the air guide door according to the signal intensity value and a preset relation; the preset relation is used for representing the corresponding relation between the millimeter wave signal strength and the temperature.
Preferably, the obtaining module 31 is further configured to: acquiring the temperature of an inlet pipe and the temperature of an outlet pipe of an evaporator in an air conditioner; and carrying out average calculation according to the inlet pipe temperature and the outlet pipe temperature to obtain the temperature of the evaporator coil.
The anti-freezing control device for the air conditioner indoor unit provided by the embodiment of the invention has the same technical characteristics as the anti-freezing control method for the air conditioner indoor unit provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention also provides an air conditioner, which comprises a processor and a memory, wherein the memory stores machine executable instructions capable of being executed by the processor, and the processor executes the machine executable instructions to realize the anti-freezing control method of the air conditioner indoor unit.
Referring to fig. 4, the air conditioner includes a processor 100 and a memory 101, the memory 101 stores machine executable instructions capable of being executed by the processor 100, and the processor 100 executes the machine executable instructions to implement the anti-freezing control method for the air conditioner indoor unit.
Further, the air conditioner shown in fig. 4 further includes a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected through the bus 102.
The Memory 101 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like may be used. The bus 102 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Enhanced Industry Standard Architecture) bus, or the like. The above-mentioned bus may be classified into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one double-headed arrow is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
The embodiment also provides a machine-readable storage medium, which stores machine-executable instructions, and when the machine-executable instructions are called and executed by the processor, the machine-executable instructions cause the processor to realize the anti-freezing control method for the air conditioner indoor unit.
The method and the device for controlling freezing prevention of the air conditioner indoor unit and the computer program product of the air conditioner provided by the embodiments of the present invention include a computer-readable storage medium storing program codes, where instructions included in the program codes may be used to execute the method described in the foregoing method embodiments, and specific implementations may refer to the method embodiments and will not be described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A freezing prevention control method for an air conditioner indoor unit is characterized by comprising the following steps:
when the air conditioner operates according to a refrigeration mode, acquiring the temperature of an evaporator coil and the surface temperature of a wind guide door;
calculating a temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door;
acquiring the air outlet temperature of the air conditioner, and judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition; the anti-freezing condition comprises a first anti-freezing condition and a second anti-freezing condition, wherein the first anti-freezing condition is used for representing the anti-freezing condition when the air conditioner starts to frost, and the second anti-freezing condition is used for representing the anti-freezing condition in the process of frosting the air conditioner;
and if so, controlling the air conditioner to operate according to the anti-freezing mode.
2. The method of claim 1, wherein the freeze protection condition comprises a temperature difference threshold and a temperature threshold; the temperature difference threshold comprises a first temperature difference threshold and a second temperature difference threshold, and the first temperature difference threshold is smaller than the second temperature difference threshold; the temperature threshold comprises a first temperature threshold and a second temperature threshold, and the first temperature threshold is greater than the second temperature threshold;
judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition or not, wherein the judging step comprises the following steps of:
judging whether the temperature difference is not less than the first temperature difference threshold value and is less than the second temperature difference threshold value; and whether the outlet air temperature is less than the first temperature threshold value;
and if so, judging that the outlet air temperature and the temperature difference meet the first anti-freezing condition.
3. The method of claim 2, wherein the step of determining whether the outlet air temperature and the temperature difference satisfy a freeze prevention condition further comprises:
judging whether the temperature difference is smaller than the first temperature difference threshold value or not, and judging whether the outlet air temperature is smaller than the second temperature threshold value or not;
and if so, judging that the outlet air temperature and the temperature difference meet the second anti-freezing condition.
4. The method as claimed in claim 2, wherein if the outlet air temperature and the temperature difference satisfy the first anti-freezing condition, the step of controlling the air conditioner to operate in an anti-freezing mode comprises:
and controlling the rotating speed of an indoor fan of the air conditioner to be increased to the maximum rotating speed.
5. The method as claimed in claim 3, wherein if the outlet air temperature and the temperature difference satisfy the second anti-freezing condition, the step of controlling the air conditioner to operate in an anti-freezing mode comprises:
and controlling the frequency of a compressor of the air conditioner to be reduced according to a preset variable quantity, and controlling the compressor to operate according to the reduced frequency.
6. The method of claim 1, wherein the step of obtaining the evaporator coil temperature and the air deflection door surface temperature comprises:
controlling a radar to emit millimeter waves to a wind guide door and acquiring a signal intensity value of the millimeter waves reflected by the wind guide door;
determining the corresponding surface temperature of the air guide door according to the signal intensity value and a preset relation; and the preset relation is used for representing the corresponding relation between the millimeter wave signal strength and the temperature.
7. The method of claim 1, wherein the step of obtaining the evaporator coil temperature and the air deflection door surface temperature further comprises:
acquiring the temperature of an inlet pipe and the temperature of an outlet pipe of an evaporator in the air conditioner;
and carrying out average calculation according to the inlet pipe temperature and the outlet pipe temperature to obtain the evaporator coil temperature.
8. The utility model provides an air conditioner indoor unit prevents frostbite controlling means which characterized in that, the device includes:
the acquisition module is used for acquiring the temperature of an evaporator coil and the surface temperature of the air guide door when the air conditioner operates in a refrigeration mode;
the calculating module is used for calculating the temperature difference between the temperature of the evaporator coil and the surface temperature of the air guide door;
the judging module is used for acquiring the air outlet temperature of the air conditioner and judging whether the air outlet temperature and the temperature difference meet the anti-freezing condition or not; the anti-freezing conditions comprise a first anti-freezing condition and a second anti-freezing condition, wherein the first anti-freezing condition is used for representing the anti-freezing condition when the air conditioner starts to frost, and the second anti-freezing condition is used for representing the anti-freezing condition in the process of frosting the air conditioner;
and the control module is used for controlling the air conditioner to operate according to the anti-freezing mode if the current mode is positive.
9. An air conditioner comprising a memory, a processor and a computer program stored on said memory and executable on said processor, wherein said processor when executing said computer program performs the steps of the method of any of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, performs the steps of the method of any of the preceding claims 1-7.
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| CN202310032278.6A CN115930367A (en) | 2023-01-10 | 2023-01-10 | Anti-freezing control method and device for air conditioner indoor unit and air conditioner |
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| CN202310032278.6A CN115930367A (en) | 2023-01-10 | 2023-01-10 | Anti-freezing control method and device for air conditioner indoor unit and air conditioner |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423495A (en) * | 2015-12-16 | 2016-03-23 | 美的集团武汉制冷设备有限公司 | Air conditioner as well as freeze control method and device thereof |
| JP2018017458A (en) * | 2016-07-28 | 2018-02-01 | 三菱電機ビルテクノサービス株式会社 | Freezing prevention system for air conditioner and control device for air conditioner |
| CN109323424A (en) * | 2018-11-13 | 2019-02-12 | 青岛海尔空调器有限总公司 | Control method for air conditioner |
| CN111189187A (en) * | 2018-11-14 | 2020-05-22 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN114636225A (en) * | 2022-03-18 | 2022-06-17 | 青岛海尔空调器有限总公司 | Method and device for air conditioner freezing protection, air conditioner and storage medium |
| CN114791155A (en) * | 2022-04-02 | 2022-07-26 | Tcl空调器(中山)有限公司 | Anti-freezing control method and device for air conditioner, electronic equipment and storage medium |
| CN115076911A (en) * | 2022-05-30 | 2022-09-20 | 青岛海尔空调器有限总公司 | Air conditioner control method and device and air conditioner |
| CN115289618A (en) * | 2022-08-19 | 2022-11-04 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, air conditioner and computer readable storage medium |
-
2023
- 2023-01-10 CN CN202310032278.6A patent/CN115930367A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423495A (en) * | 2015-12-16 | 2016-03-23 | 美的集团武汉制冷设备有限公司 | Air conditioner as well as freeze control method and device thereof |
| JP2018017458A (en) * | 2016-07-28 | 2018-02-01 | 三菱電機ビルテクノサービス株式会社 | Freezing prevention system for air conditioner and control device for air conditioner |
| CN109323424A (en) * | 2018-11-13 | 2019-02-12 | 青岛海尔空调器有限总公司 | Control method for air conditioner |
| CN111189187A (en) * | 2018-11-14 | 2020-05-22 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN114636225A (en) * | 2022-03-18 | 2022-06-17 | 青岛海尔空调器有限总公司 | Method and device for air conditioner freezing protection, air conditioner and storage medium |
| CN114791155A (en) * | 2022-04-02 | 2022-07-26 | Tcl空调器(中山)有限公司 | Anti-freezing control method and device for air conditioner, electronic equipment and storage medium |
| CN115076911A (en) * | 2022-05-30 | 2022-09-20 | 青岛海尔空调器有限总公司 | Air conditioner control method and device and air conditioner |
| CN115289618A (en) * | 2022-08-19 | 2022-11-04 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, air conditioner and computer readable storage medium |
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